23dfff4105
In order to move away from the existing flows having their own implementation of running, start moving the existing flows to be patterns that only structure tasks (and impose constraints about how the group of tasks can run) in useful ways. Let the concept of running those patterns be handled by an engine instead of being handled by the flow itself. This will allow for varying engines to be able to run flows in whichever way the engine chooses (as long as the constraints set up by the flow are observed). Currently threaded flow and graph flow are broken by this commit, since they have not been converted to being a structure of tasks + constraints. The existing engine has not yet been modified to run those structures either, work is underway to remediate this. Part of: blueprint patterns-and-engines Followup bugs that must be addressed: Bug: 1221448 Bug: 1221505 Change-Id: I3a8b96179f336d1defe269728ebae0caa3d832d7
152 lines
4.5 KiB
Python
152 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2013 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from taskflow import task
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from taskflow import test
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class MyTask(task.Task):
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def execute(self, context, spam, eggs):
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pass
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class KwargsTask(task.Task):
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def execute(self, spam, **kwargs):
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pass
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class TaskTestCase(test.TestCase):
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def test_passed_name(self):
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my_task = MyTask(name='my name')
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self.assertEquals(my_task.name, 'my name')
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def test_generated_name(self):
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my_task = MyTask()
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self.assertEquals(my_task.name,
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'%s.%s' % (__name__, 'MyTask'))
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def test_no_provides(self):
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my_task = MyTask()
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self.assertEquals(my_task.provides, {})
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def test_provides(self):
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my_task = MyTask(provides='food')
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self.assertEquals(my_task.provides, {'food': None})
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def test_multi_provides(self):
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my_task = MyTask(provides=('food', 'water'))
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self.assertEquals(my_task.provides, {'food': 0, 'water': 1})
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def test_unpack(self):
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my_task = MyTask(provides=('food',))
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self.assertEquals(my_task.provides, {'food': 0})
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def test_bad_provides(self):
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with self.assertRaisesRegexp(TypeError, '^Task provides'):
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MyTask(provides=object())
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def test_requires_by_default(self):
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my_task = MyTask()
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self.assertEquals(my_task.requires, {
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'spam': 'spam',
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'eggs': 'eggs',
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'context': 'context'
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})
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def test_requires_amended(self):
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my_task = MyTask(requires=('spam', 'eggs'))
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self.assertEquals(my_task.requires, {
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'spam': 'spam',
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'eggs': 'eggs',
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'context': 'context'
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})
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def test_requires_explicit(self):
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my_task = MyTask(auto_extract=False,
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requires=('spam', 'eggs', 'context'))
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self.assertEquals(my_task.requires, {
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'spam': 'spam',
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'eggs': 'eggs',
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'context': 'context'
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})
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def test_requires_explicit_not_enough(self):
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with self.assertRaisesRegexp(ValueError, '^Missing arguments'):
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MyTask(auto_extract=False, requires=('spam', 'eggs'))
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def test_rebind_all_args(self):
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my_task = MyTask(rebind={'spam': 'a', 'eggs': 'b', 'context': 'c'})
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self.assertEquals(my_task.requires, {
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'spam': 'a',
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'eggs': 'b',
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'context': 'c'
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})
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def test_rebind_partial(self):
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my_task = MyTask(rebind={'spam': 'a', 'eggs': 'b'})
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self.assertEquals(my_task.requires, {
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'spam': 'a',
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'eggs': 'b',
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'context': 'context'
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})
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def test_rebind_unknown(self):
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with self.assertRaisesRegexp(ValueError, '^Extra arguments'):
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MyTask(rebind={'foo': 'bar'})
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def test_rebind_unknown_kwargs(self):
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task = KwargsTask(rebind={'foo': 'bar'})
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self.assertEquals(task.requires, {
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'foo': 'bar',
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'spam': 'spam'
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})
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def test_rebind_list_all(self):
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my_task = MyTask(rebind=('a', 'b', 'c'))
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self.assertEquals(my_task.requires, {
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'context': 'a',
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'spam': 'b',
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'eggs': 'c'
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})
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def test_rebind_list_partial(self):
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my_task = MyTask(rebind=('a', 'b'))
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self.assertEquals(my_task.requires, {
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'context': 'a',
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'spam': 'b',
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'eggs': 'eggs'
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})
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def test_rebind_list_more(self):
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with self.assertRaisesRegexp(ValueError, '^Extra arguments'):
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MyTask(rebind=('a', 'b', 'c', 'd'))
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def test_rebind_list_more_kwargs(self):
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task = KwargsTask(rebind=('a', 'b', 'c'))
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self.assertEquals(task.requires, {
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'spam': 'a',
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'b': 'b',
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'c': 'c'
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})
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def test_rebind_list_bad_value(self):
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with self.assertRaisesRegexp(TypeError, '^Invalid rebind value:'):
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MyTask(rebind=object())
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